Test if a value is null.

Checks if the given value is null or undefined

Checks if `value` is `null` or `undefined`.

Applies a default value to a variable if it is null or undefined.

A simple javascript function that will return true if the value is null like (aka undefined or null)

Checks if a value is null.

Checks whether a given string is null or empty

checks if value is null

The missing existential operator for JavaScript. Returns true unless a variable is null or undefined

Checks if the given value is null.

Determine if a value is `null`

If value is null or undefined, it sets a default value instead.

Checks if a value is null or undefined.

Check if a given object is null or empty

Indicate if a string is null or white spaced

A utility to determine if a value is null

this a package for check a value is null or empty

a utility for checking is a value is null or empty

Determine if a value is `null`

is-null function part of http://amp.ampersandjs.com.